chromeos: Add WebUI implementation of form repost dialog.

chrome/browser/ui/webui/repost_form_warning_ui.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_REPOST_FORM_WARNING_UI_H_
+#define CHROME_BROWSER_UI_WEBUI_REPOST_FORM_WARNING_UI_H_
+#pragma once
+
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/native_widget_types.h"
+
+class RepostFormWarningController;
+class TabContents;
+
+// Displays a dialog that warns the user that they are about to resubmit
+// a form.
+// To display the dialog, allocate this object on the heap. It will open the
+// dialog from its constructor and then delete itself when the user dismisses
+// the dialog.
+class RepostFormWarningUI {
+ public:
+  // Use BrowserWindow::ShowRepostFormWarningDialog to use.
+  RepostFormWarningUI(gfx::NativeWindow parent_window,

[arv (Not doing code reviews), 2011/09/07 20:58:20]

If you don't want this to be used can you make the constructor private and use
friend class or is that considered bad practice?

[Daniel Erat, 2011/09/08 01:46:56]

Sounds reasonable to me.  Done.

+                      TabContents* tab_contents);
+
+  // Invoked when the dialog is closed.  Notifies the controller of the user's
+  // response and deletes this object.
+  void OnDialogClosed(bool repost);
+
+ private:
+  virtual ~RepostFormWarningUI();
+
+  scoped_ptr<RepostFormWarningController> controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(RepostFormWarningUI);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_REPOST_FORM_WARNING_UI_H_